Bosch Rexroth | 4WEH22E7X6EW110N9ETDALB10
4WEH22E7X/6EW110N9ETDAL/B10
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The 4WEH22E7X/6EW110N9ETDAL/B10 valve is manufactured by Bosch Rexroth in the WEH Directional Spool Valves series. It routes hydraulic flow to actuators in automated machinery. The unit is built as a 4-way valve so that separate pressure, tank, and two work ports can be controlled independently. Its nominal size is NG25, allowing full-bore passage for medium to high flow circuits. The spool carries symbol E and provides three functional positions for centered, left, and right actuation states. With a rated flow capacity of 450 l/min at the E configuration, the valve suits high throughput systems. Upstream pressure may reach 280 bar on ports P, A, or B without affecting spool shift accuracy. A concealed manual override (code N9) permits local actuation during commissioning while preventing unintentional operation. The ISO 4401-08-08-0-05 porting pattern aligns with standardized subplates for straightforward manifold integration.
The valve uses internal pilot oil supply identified by code ET, so control pressure is taken from the main inlet without external lines, and the pilot oil is returned internally to port T to simplify plumbing. Pilot stages can accept up to 210 bar, while the spring-centered mechanism requires at least 10.5 bar to shift reliably. Port T can be loaded to 250 bar, letting the return circuit handle back-pressure from downstream restrictions. A 1.0 mm throttle insert designated B10 sits in the pilot gallery to damp pressure spikes and stabilize shifting speed. Six mounting screws sized M12 × 60 secure the body to the subplate, and each screw should be tightened to 100 Nm to maintain seal compression under load. These mechanical and hydraulic limits ensure dependable directional control in continuous industrial service.
Technical Specifications
Manual Override
Concealed (N9)
Max Flow (symbol E)
450 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Max Port T Pressure
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Screws
6 × M12 × 60
Nominal Size
NG25 (W.H 22)
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (ET)
Porting Pattern
ISO 4401-08-08-0-05
Positions
3 Positions
Screw Tightening Torque
100 Nm
Spool Symbol
E
Throttle Insert
Ø 1.0 mm (B10)
Ways
4-Way
1620 Old Apex Road
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